CN219079050U - Cover lifting mechanism and charging machine - Google Patents
Cover lifting mechanism and charging machine Download PDFInfo
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- CN219079050U CN219079050U CN202320129483.XU CN202320129483U CN219079050U CN 219079050 U CN219079050 U CN 219079050U CN 202320129483 U CN202320129483 U CN 202320129483U CN 219079050 U CN219079050 U CN 219079050U
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- rope
- cam
- side plate
- upper cover
- lifting mechanism
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The application discloses cover lifting mechanism, cover lifting mechanism include cantilever, first pulley, second pulley, rope and cam unit, and first pulley and second pulley set up respectively at the first end and the second end of cantilever, and the rope winds first pulley and second pulley in proper order, and the head end fixed connection of rope is covered on, and the tail end fixed connection of rope is on the cam unit, and the cam unit is configured to the downwardly pulling rope in order to lifting upper cover. Through the cooperation of first pulley, second pulley, rope and cam unit, the promotion or the decline of upper cover are realized to the pulling rope under the drive of cam unit, and this kind of mode of opening upper cover is simpler, laborsaving, convenient than current screw nut pair.
Description
Technical Field
The application belongs to the field of single crystal furnace charging, and particularly relates to a cover lifting mechanism and a charging machine.
Background
In the use of the feeder, the upper cover of the feeder bin needs to be opened to add materials into the bin. At present, the top upper cover is lifted mainly through a screw-nut pair structure, and the structure is laborious and inconvenient to operate.
Disclosure of Invention
Aiming at the problem that an upper cover of a conventional charging machine is inconvenient to open, the utility model provides a cover lifting mechanism and the charging machine.
In a first aspect, the utility model provides a cover lifting mechanism, which comprises a cantilever, a first pulley, a second pulley, a rope and a cam unit, wherein the first pulley and the second pulley are respectively arranged at a first end and a second end of the cantilever, the rope sequentially winds around the first pulley and the second pulley, the first end of the rope is fixedly connected to an upper cover, the tail end of the rope is fixedly connected to the cam unit, and the cam unit is configured to pull the rope downwards to lift the upper cover.
Through the cooperation of first pulley, second pulley, rope and cam unit, the promotion or the decline of upper cover are realized to the pulling rope under the drive of cam unit, and this kind of mode of opening upper cover is simpler, laborsaving, convenient than current screw nut pair.
Optionally, the cover lifting mechanism further comprises a first connecting unit, the first connecting unit is used for fixedly connecting the head end of the rope on the upper cover, the first connecting unit comprises a rope pressing block, the head end of the rope is wound on the rope pressing block, and the rope pressing block is fixedly arranged on the upper cover.
The rope pressing block is used for fixing the head end of the rope on the upper cover, so that the connection stability of the rope and the upper cover can be improved.
Optionally, the first connection unit further comprises a transition wheel, the transition wheel is arranged at the front side of the rope pressing block, and the head end of the rope is wound on the rope pressing block after passing through the transition wheel;
and/or the number of the groups of groups,
the first connecting unit further comprises a fixing plate, the rope pressing block is fixedly arranged on the fixing plate, and the fixing plate is fixedly arranged on the upper cover.
The transition wheel is arranged at the front side of the rope pressing block, and the rope is transited down by the transition wheel before contacting with the rope pressing block, so that the head end of the rope can be better attached to the rope pressing block, and the crimping stability of the rope pressing block to the head end of the rope is improved; the rope pressing block and the upper cover are fixed through the fixing plate, one side is convenient for the transformation of the existing device, and on one hand, the rope pressing block is fixed.
Optionally, the cover lifting mechanism further comprises at least two guide rods, the first end of each guide rod is slidably arranged on the cantilever in a penetrating mode, and the second end of each guide rod is fixedly arranged on the upper cover.
Through setting up two at least guide bars between cantilever and upper cover, at the in-process that the cantilever carried the upper cover to go up and down, can lead the upper cover, make the upper cover can go up and down steadily.
Optionally, the cover lifting mechanism further comprises a support column and a mounting seat, the second end of the cantilever is rotatably arranged on the support column, the support column is fixedly arranged on the mounting seat, and the support column and the mounting seat are respectively provided with a through hole for a rope to pass through.
Through setting up support column and mount pad for the cantilever can use the support column to rotate as the fulcrum, with the upper cover that drives the cantilever to carry and draw rotates, further unscrews the upper cover for the feed bin of feeder.
Optionally, the cam unit comprises a cam mounting frame, a lifting bracket, an adjusting shaft and a cam, the cam mounting frame comprises a first side plate and a second side plate, waist-shaped holes extending along the vertical direction are formed in the first side plate and the second side plate, the adjusting shaft is erected in the waist-shaped holes of the first side plate and the second side plate, and two ends of the adjusting shaft penetrate through the waist-shaped holes and are fixedly connected with the lifting bracket; the cam is rotatably arranged between the first side plate and the second side plate and is configured to drive the adjusting shaft to lift along the waist-shaped hole so as to realize the lifting of the lifting bracket relative to the cam mounting frame;
the tail end of the rope is fixedly connected to the lifting bracket.
The lifting support is driven to lift through the cam, so that the tail end of the rope fixedly connected with the lifting support is lifted, and the structure is simple and flexible.
Optionally, the cam unit further comprises a cam connecting rod, an upper limiting part and a lower limiting part, wherein the cam connecting rod is fixedly connected to the cam, the upper limiting part and the lower limiting part are arranged on the first side plate and/or the second side plate and are respectively used for limiting the upper stroke and the lower stroke of the cam connecting rod.
The upper and lower limiting parts limit the upper and lower strokes of the cam, namely limit the lifting distance of the upper cover, so that the lifting position of the upper cover is controllable.
Optionally, the cam unit further comprises a cam connecting rod and a limiting part, and the limiting part is used for limiting a stop position of the cam connecting rod.
The stop position of the cam connecting rod is limited by the limiting part, so that the cam connecting rod stays at the stop position for a long time, namely, the upper cover is located at the lifting position for a long time, and the structure is reliable and convenient.
Optionally, a plurality of rolling bodies are arranged between the first side plate and the lifting support and between the second side plate and the lifting support.
The rolling bodies are arranged between the first side plate and the lifting support and between the second side plate and the lifting support, so that friction between the lifting support and the side plate in the lifting process can be reduced, and the lifting flexibility is improved.
Optionally, the cover lifting mechanism further comprises an elastic piece and a rope sleeve, one end of the elastic piece is fixedly connected to the mounting seat, and the other end of the elastic piece is fixedly connected to the lifting bracket; the rope sleeve is used for fixing the tail end of the rope and is fixedly arranged on the lifting support.
By arranging the elastic piece, part of the pulling force when the upper cover rises can be counteracted, so that the cover lifting mechanism is more labor-saving; the rope sleeve is used for fixing the tail end of the rope on the lifting support, so that the tail end of the rope can be conveniently fixed.
In a second aspect, the utility model provides a charging machine, comprising a bin, an upper cover and a cover lifting mechanism as described above, wherein the upper cover is positioned at the top of the bin, the head end of the rope is fixedly connected to the upper cover, and the cam unit is fixedly arranged on the side wall of the bin.
The cover lifting mechanism is arranged on the charging machine, so that the upper cover of the charging machine can be lifted conveniently.
Drawings
FIG. 1 is a schematic view of a lid lifting mechanism mounted on a feeder;
FIG. 2 is a schematic illustration of one implementation of a capping mechanism;
FIG. 3 is a cross-sectional view of the capping mechanism of FIG. 2;
FIG. 4 is a schematic view of the cam unit of the capping mechanism of FIG. 2;
FIG. 5 is a schematic view of the other view of FIG. 4;
in the figure: cantilever 1, first pulley 2, second pulley 3, rope 4, cam unit 5, cam mount 51, first side plate 511, second side plate 512, waist-shaped hole 513, lifting bracket 52, adjusting shaft 53, cam 54, cam connecting rod 55, upper stopper 56, lower stopper 57, rolling element 58, stopper 59, first connecting unit 6, rope pressing block 61, transition wheel 62, fixed plate 63, guide rod 7, support column 8, through hole 81, mount 9, elastic member 10, rope sleeve 11, silo 12, upper cover 13.
Detailed Description
For the purposes, technical solutions and advantages of the embodiments of the present application, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Wherein the described embodiments are some, but not all, of the embodiments of the present application. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application.
The present application will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
In order to solve the problem that an upper cover of a current charging machine is inconvenient to open, the utility model provides a cover lifting mechanism, as shown in fig. 1, 2 and 3, wherein the cover lifting mechanism comprises a cantilever 1, a first pulley 2, a second pulley 3, a rope 4 and a cam unit 5, the first pulley 2 and the second pulley 3 are respectively arranged at a first end and a second end of the cantilever 1, the rope 4 sequentially winds around the first pulley 2 and the second pulley 3, the first end of the rope 4 is fixedly connected to an upper cover 13, the tail end of the rope 4 is fixedly connected to the cam unit 5, and the cam unit 5 is configured to pull the rope 4 downwards to lift the upper cover 13.
Through the cooperation of the first pulley 2, the second pulley 3, the rope 4 and the cam unit 5, the rope 4 is pulled under the drive of the cam unit 5 to realize the lifting or the descending of the upper cover 13, and the mode of opening the upper cover 13 is simpler, more labor-saving and more convenient than the current screw nut pair.
When the head end of the rope 4 is fixed on the upper cover 13, in order to increase the connection stability between the rope 4 and the upper cover 13, as shown in fig. 2 and 3, the cover lifting mechanism further comprises a first connecting unit 6, the first connecting unit 6 is used for fixedly connecting the head end of the rope 4 on the upper cover 13, the first connecting unit 6 comprises a rope pressing 4 block, the head end of the rope 4 is wound on the rope pressing 4 block, and the rope pressing 4 block is fixedly arranged on the upper cover 13.
The head end of the rope 4 is pressed and fixed on the upper cover 13 by the rope pressing 4 block, so that the contact area between the head end of the rope 4 and the upper cover 13 can be increased, the friction force is improved, the head end of the rope 4 is prevented from rolling, and the stability of the upper cover 13 during lifting is further affected.
In an alternative embodiment, as shown in fig. 3, the first connection unit 6 further includes a transition wheel 62, where the transition wheel 62 is disposed at the front side of the rope pressing 4 block, and the head end of the rope 4 is wound around the rope pressing 4 block after passing through the transition wheel 62.
The transition wheel 62 is arranged on the front side of the rope pressing 4 block, and before the rope 4 contacts with the rope pressing 4 block, the rope 4 is transited by the transition wheel 62, so that the head end of the rope 4 can be better attached to the rope pressing 4 block, and the crimping stability of the rope pressing 4 block to the head end of the rope 4 is improved.
In an alternative embodiment, the first connection unit 6 further includes a fixing plate 63, the pressing rope 4 is fixedly disposed on the fixing plate 63, and the fixing plate 63 is fixedly disposed on the upper cover 13.
The fixing plate 63 is used for fixing the rope pressing 4 block and the upper cover 13, so that the existing device is convenient to reform, and the rope pressing 4 block is fixed.
Of course, in an alternative embodiment, the first connection unit 6 further includes a transition wheel 62 and a fixing plate 63, the transition wheel 62 is disposed at the front side of the rope pressing 4 block, and the head end of the rope 4 is wound on the rope pressing 4 block after passing through the transition wheel 62; the pressing rope 4 is fixedly arranged on the fixing plate 63, and the fixing plate 63 is fixedly arranged on the upper cover 13.
Optionally, as shown in fig. 3, the cover lifting mechanism further includes at least two guide rods 7, a first end of each guide rod 7 is slidably disposed through the cantilever 1, and a second end of each guide rod 7 is fixedly disposed on the upper cover 13. Of course, the second end of the guide bar 7 may be fixed to the upper cover 13 by a connecting plate such as the fixing plate 63 shown in fig. 2, as long as the second end of the guide bar 7 is fixed to the upper cover 13.
By providing at least two guide bars 7 between the cantilever 1 and the upper cover 13, the upper cover 13 can be guided in the process of lifting the cantilever 1 with the upper cover 13, so that the upper cover 13 can be lifted smoothly.
Optionally, as shown in fig. 3, the cover lifting mechanism further includes a support column 8 and a mounting seat 9, the second end of the cantilever 1 is rotatably disposed on the support column 8, the support column 8 is fixedly disposed on the mounting seat 9, and the support column 8 and the mounting seat 9 are both provided with a through hole 81 through which the rope 4 passes.
Through setting up support column 8 and mount pad 9 for cantilever 1 can regard as the fulcrum to rotate, with the upper cover 13 that drives cantilever 1 to carry and draw, further unscrew upper cover 13 for the feed bin 12 of feeder.
Alternatively, as shown in fig. 4 and 5, the cam unit 5 includes a cam mounting frame 51, a lifting bracket 52, an adjusting shaft 53 and a cam 54, the cam mounting frame 51 includes a first side plate 511 and a second side plate 512, the first side plate 511 and the second side plate 512 are provided with waist-shaped holes 513 extending in a vertical direction, the adjusting shaft 53 is erected in the waist-shaped holes 513 of the first side plate 511 and the second side plate 512, and two ends of the adjusting shaft 53 pass through the waist-shaped holes 513 and are fixedly connected with the lifting bracket 52; a cam 54 is rotatably installed between the first side plate 511 and the second side plate 512, and the cam 54 is configured to drive the adjusting shaft 53 to lift along the waist-shaped hole 513 to lift the lifting bracket 52 relative to the cam mounting bracket 51, and the tail end of the rope 4 is fixedly connected to the lifting bracket 52.
The lifting of the lifting bracket 52 is driven by the cam, so that the tail end of the rope 4 fixedly connected with the lifting bracket 52 is lifted, and the structure is simple, flexible and reliable.
Optionally, the cam unit 5 further includes a cam connecting rod 55, an upper limiting member 56 and a lower limiting member 57, where the cam connecting rod 55 is fixedly connected to the cam, and the upper limiting member 56 and the lower limiting member 57 are disposed on the first side plate 511 and/or the second side plate 512, and are respectively used for limiting the up-and-down travel of the cam connecting rod 55.
The up-down travel of the cam 54 is limited by the up-down limiting member, namely, the lifting distance of the upper cover 13 is limited, so that the lifting position of the upper cover 13 is controllable.
The upper limiting piece 56 can be a rigid limiting rod or a limiting column, or a flexible limiting rod or a flexible limiting column can be adopted, so that the upward rotation of the cam connecting rod 55 can be limited; a rigid stop lever or post may be selected for the lower stop 57 to satisfy the requirement that the lower stop 57 cannot be overcome even if the cam link 55 is forced.
For the upper stopper 56 and the lower stopper 57, when the stopper post or the stopper rod is selected, the stopper post or the stopper rod may be installed between the first side plate 511 or the second side plate 512, or between the two, so that the cam connecting rod 55 may not rotate.
Optionally, as shown in fig. 4, the cam unit 5 further includes a cam connecting rod 55 and a limiting portion 59, when the cam unit 5 has both the lower limiting member 57 and the limiting portion 59, the limiting portion 59 is located above the lower limiting member 57, and the limiting portion 59 is used for limiting a stop position of the cam connecting rod 55.
The stop position of the cam connecting rod 55 is limited by the limiting part 59, so that the cam connecting rod 55 stays at the stop position for a long time, namely, the upper cover 13 is in the lifting position for a long time, and the structure is reliable and convenient.
The limiting plunger with certain elasticity can be selected for the limiting portion 59, the limiting plunger is arranged on the first side plate 511 or the second side plate 512, or the limiting plungers are symmetrically arranged on the first side plate 511 and the second side plate 512, so that a gap capable of enabling the cam connecting rod 55 to rotate through when being stressed is formed between the two limiting plungers, and after the cam connecting rod 55 is pushed to pass through the limiting plunger, the cam connecting rod 55 always stops at a stop position due to the obstruction of the limiting portion 59 when rotating upwards under the tensile force of the upper cover 13.
Specifically, when the upper cover 13 needs to be lifted, the cam connecting rod 55 is pushed downwards to drive the cam 54 to rotate, and the adjusting shaft 53 fixedly connected with the lifting bracket 52 is pushed downwards along the waist-shaped hole 513 in the process of rotating the cam 54, so that the lifting bracket 52 descends by a certain height, the rope 4 fixedly connected to the lifting bracket 52 is pulled, and on the premise that the length of the rope 4 is fixed, the tail end of the rope 4 descends, the head end of the rope 4 is driven to ascend, and the upper cover 13 fixed with the head end of the rope 4 is lifted;
the cam connecting rod 55 is pushed downwards to the lower part of the limiting part 59, so that the upper cover 13 is lifted by a certain distance relative to the stock bin 12;
pushing the upper cover 13 to rotate by taking the supporting column 8 as an origin, so that the upper cover 13 and the storage bin 12 are staggered by a certain angle, and materials can be conveniently added into the storage bin 12;
after the material is added, the upper cover 13 is pushed to reversely rotate by taking the supporting column 8 as an origin, so that the upper cover 13 and the storage bin 12 are overlapped in the vertical direction;
the cam link 55 is pushed upward, so that the cam link 55 moves upward beyond the stopper 59, thereby achieving the closing between the upper cover 13 and the bin 12.
Optionally, a plurality of rolling elements 58 are disposed between the first side plate 511 and the lifting bracket 52, and between the second side plate 512 and the lifting bracket 52.
The rolling bodies 58 are arranged between the first side plate 511 and the lifting support 52 and between the second side plate 512 and the lifting support 52, so that friction between the lifting support 52 and the side plates in the lifting process can be reduced, and lifting flexibility is improved.
Optionally, the cover lifting mechanism further comprises an elastic piece 10 and a rope sleeve 11, one end of the elastic piece 10 is fixedly connected to the mounting seat 9, and the other end of the elastic piece 10 is fixedly connected to the lifting bracket 52; the rope sling 11 is used for fixing the tail end of the rope 4, and the rope sling 11 is fixedly arranged on the lifting bracket 52.
By arranging the elastic piece 10, partial pulling force when the upper cover 13 rises can be counteracted, so that the cover lifting mechanism is more labor-saving; the rope sleeve 11 is used for fixing the tail end of the rope 4 on the lifting support 52, so that the tail end of the rope 4 is conveniently fixed.
In a second aspect, the utility model provides a charging machine, comprising a bin 12, an upper cover 13 and a cover lifting mechanism as described above, wherein the upper cover 13 is positioned at the top of the bin 12, the head end of the rope 4 is fixedly connected to the upper cover 13, and the cam unit 5 is fixedly arranged on the side wall of the bin 12.
The cover lifting mechanism is arranged on the charging machine, so that the upper cover 13 of the charging machine can be lifted conveniently.
The present utility model and its embodiments have been described above schematically, without limitation, and the actual structure is not limited to this, but is shown in the drawings as one of the embodiments of the present utility model. Therefore, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical scheme are not creatively designed without departing from the gist of the present utility model, and all the structural manners and the embodiment are considered to be within the protection scope of the present patent.
Claims (11)
1. The utility model provides a cover lifting mechanism, its characterized in that, cover lifting mechanism includes cantilever, first pulley, second pulley, rope and cam unit, first pulley with the second pulley sets up respectively the first end and the second end of cantilever, the rope is in turn around first pulley with the second pulley, the first end fixed connection of rope is covered, the tail end fixed connection of rope is in on the cam unit, the cam unit is configured to the downward pulling rope in order to raise the upper cover.
2. The cover lifting mechanism according to claim 1, further comprising a first connection unit for fixedly connecting a head end of the rope to the upper cover, the first connection unit comprising a rope pressing block around which the head end of the rope is wound, the rope pressing block being fixedly provided to the upper cover.
3. The cover lifting mechanism according to claim 2, wherein the first connecting unit further comprises a transition wheel, the transition wheel is arranged at the front side of the rope pressing block, and the head end of the rope is wound on the rope pressing block after passing through the transition wheel;
and/or the number of the groups of groups,
the first connecting unit further comprises a fixing plate, the rope pressing block is fixedly arranged on the fixing plate, and the fixing plate is fixedly arranged on the upper cover.
4. The lid lifting mechanism of claim 1, further comprising at least two guide rods, a first end of each guide rod slidably disposed through the cantilever arm, and a second end of each guide rod fixedly disposed on the upper lid.
5. The lid lifting mechanism of claim 1, further comprising a support post and a mounting base, wherein the second end of the cantilever is rotatably disposed on the support post, the support post is fixedly disposed on the mounting base, and the support post and the mounting base each have a through hole through which the cord passes.
6. The cover lifting mechanism according to claim 5, wherein the cam unit comprises a cam mounting frame, a lifting bracket, an adjusting shaft and a cam, the cam mounting frame comprises a first side plate and a second side plate, waist-shaped holes extending in the vertical direction are formed in the first side plate and the second side plate, the adjusting shaft is erected in the waist-shaped holes of the first side plate and the second side plate, and two ends of the adjusting shaft penetrate through the waist-shaped holes to be fixedly connected with the lifting bracket; the cam is rotatably arranged between the first side plate and the second side plate and is configured to drive the adjusting shaft to lift along the waist-shaped hole so as to realize the lifting of the lifting bracket relative to the cam mounting frame;
the tail end of the rope is fixedly connected to the lifting support.
7. The cover lifting mechanism of claim 6, wherein the cam unit further comprises a cam connecting rod, an upper limiting member and a lower limiting member, the cam connecting rod is fixedly connected to the cam, and the upper limiting member and the lower limiting member are arranged on the first side plate and/or the second side plate and are respectively used for limiting the upper and lower strokes of the cam connecting rod.
8. The lid lifting mechanism of claim 6, wherein the cam unit further comprises a cam connecting rod and a limiting portion for limiting a stop position of the cam connecting rod.
9. The lid lifting mechanism of claim 6, wherein a plurality of rolling bodies are disposed between the first side plate and the lifting bracket, and between the second side plate and the lifting bracket.
10. The cover lifting mechanism according to claim 6, further comprising an elastic member and a rope sleeve, wherein one end of the elastic member is fixedly connected to the mounting seat, and the other end of the elastic member is fixedly connected to the lifting bracket; the rope sleeve is used for fixing the tail end of the rope, and the rope sleeve is fixedly arranged on the lifting support.
11. A feeder, characterized in that the feeder comprises a bin, an upper cover and a cover lifting mechanism according to any one of claims 1-9, wherein the upper cover is positioned at the top of the bin, the head end of the rope is fixedly connected to the upper cover, and the cam unit is fixedly arranged on the side wall of the bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320129483.XU CN219079050U (en) | 2023-01-16 | 2023-01-16 | Cover lifting mechanism and charging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320129483.XU CN219079050U (en) | 2023-01-16 | 2023-01-16 | Cover lifting mechanism and charging machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219079050U true CN219079050U (en) | 2023-05-26 |
Family
ID=86399595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320129483.XU Active CN219079050U (en) | 2023-01-16 | 2023-01-16 | Cover lifting mechanism and charging machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219079050U (en) |
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2023
- 2023-01-16 CN CN202320129483.XU patent/CN219079050U/en active Active
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